Apparatus for and method of mixing plastic materials



Nov. 11' 1924.

J. G. MOOMY ET AL APPARATUS FOR AND METHOD OF MIXING PLASTIC MATERIALS Filed March 24 1922 2 SheetsSheet l mm ummmw 11,; 5 nllw l l l F i 4% 11 W a I ll/ 1 W3? 45 Will I All 1 H llml i i" l? 53 will 1 I I I L I W I III'YT' g1 a 2? 2 SheetsSheet 2 J. G. MOOMY ET AL APPARATUS FOR AND METHOD OF MIXING PLASTIC MATERIALS Filed March 24 t 19 Nov. 11 1924.,

JOSEPH G. MOONEY AND JOSEPH H- MOOMY, F ERIE, PENNSYLVANIA, ASSIGNORS OF ONE-THED T0 HARRY E. MOONEY, ONE-THIRD TO MARY H. MOONEY, OF ERIE, PENNSYLVANIA, AND ONE-THIRD T0 SAID JOSE'EH H. MOOMY.

APPARATUS FOR AND METHOD OF MIXING PLASTIC MATERIALS.

Application filed March 24, 1922. Serial No. 548,258.

To all whom it may concern:

Be it known that we, JOSEPH G. Mooivn' and J OSEPH H. MOOMY citizens of the United States, residing at Trio, in the county of Erie and State of Pennsylvania, have invented new and useful Improvements in Apparatus for and Methods of Mixing Plastic Materials, of which the following is a specification.

This invention is designed to mix plastic materials, articularly rubber. Where certain ingre 'ents are combined with the rubber, such as lamp black, the open mills ive a great deal of trouble in that the blac is sifted through the entire plant. In addition to this the mixing in our present method and invention is more varied than with the ordinary mixers used. In carrying out our in vention we place the batch in a cylinder between two working surfaces, one at least of which is rotated and force these two surfaces toward each other under pressure. In this way the batch is rotated and has a tendcncy to move toward the outer periphery which varies the turning movement of the mass so as to thoroughly mix it.

The apparatus is illustrated in the accompanying drawings as follows 2- ig. 1 shows an elevation of the machine.

Fig. 2 a central vertical section through the machine.

Fig. 3 a section on the line 3-3 in Fig. 2.

Fig. 4 a section on the line 4-4= in Fig. 3.

1 marks the base, 2 a cylinder carrying head. 3 a flange on the head 2 which is scoured to the base by means of bolts 4. A cylinder 5 extends from the head 2. A nonrotative mixing member 6 is slidingly mounted in the cylinder 5 and has-a working surface 7. A plunger 8 extends from the member 6 and this is provided with a cup 9 at its end forming a closure with the walls of the cylinder 10 in which the plunger operates. The plunger is provided with a groove 11 which is engaged by a spline 12 so as to lock the member 6 against rotation. Fluid, ordinarily air, is delivered through the passage 13 from a supply pipe 14 to force the member 6 upwardly so as to place pressure on the batch.

An upper rotating member 15 opposes the member 6 and has a corrugated working surfaoel6. The member 15 operates against a ball bearing 17 which takes the thrust against the member and has a shank 18-" which operates in a bearing 18 in a cover 18 on the cylinder. A gear 19 is fixed by a key 20 on the shank, or shaft 18 and meshes with a gear 21. The gear 21 is fixed on the shaft 22 by a key 23. The shaft 22 is ournaled in bearings 24 carried by brackets 25 extending from the head 2 and cylinder 5. A bevelled gear 26 is fixed on the lower end of the shaft 22 by means of a key 27 and meshes with a gear 28 fixed on a key 29 on a horizontal drive shaft 30. The shaft 30 is journaled in bearings 31 in the base 1. It will readily be seen that as the shaft 30 is rotated this motion is communicated through the mechanism described to the member 15. In operation, therefore, the batch is placed between th two surfaces 7 and 16. The upper member is rotated. The lower member is lifted under pressure. The batch, therefore, is subjected to the rotary movement between the surfaces and tends to move between the outer periphery of these surfaces, this movement giving to the batch a secondary turning movement so that there is a variation in the mixin effect which results in a homogeneous tioroughly mixed mass.

The member 15 has a cooling chamber 32 and cooling water is carried to this through a pipe 33 and discharged through an opening 34 in the shank 18.

An opening 35 is made in the walls of the cylinder to the space between the members 6 and 15 and this opening is closed by the doors 36 and 37 mounted on hinges 38. The lower door has a lower off-set 39 forming a seat with a surface 40 on the edge of the door opening, the upper edge of the door 37 being provided with a seating surface 41 which engages a surface 42 of the door 36. The door 36 also has a surface 43 engaging a surface 14: on the edge of the opening to the cylinder. The. doors are provided with the fastening lugs 45 in which eye bolts 46 are arranged for clamping the doors in closed position. By this method both doors are sealed and the doors may be opened separately as required.

The doors are provided with the cooling chambers 4.7 to which water is communicated by way of pipes 48 and discharged by way of pipes 49, these pipes having the connections 48 which permit of their being disconnected so as to swing the doors. The cylinder is also provided with a coolin chamber which is sup lied through pipes 51, the discharge being by way of a pipe 52.

What we claim as new is 1. In a mixing machine, the combination of a mixing cylinder; mixing members in the cylinder having working faces at right angles to the axis of the cylinder; and means for rotating one of said members and for moving one of them axially to compress an interposed batch.

2. In a mixing machine, the combination of a mixing cylinder; mixing members in the cylinder having corrugated working surfaces at right angles to the axis of the cylinder; and means for rotating one of said members and for moving one of said members axially to compress an interposed batch.

3. In a mixing machine, the combination of a mixing cylinder; mixing members in the cylinder having working faces at right angles to the axis of the cylinder; means for rotating one of said members; and means for moving the other of saidmembers axially to exert pressure on an interposed batch.

4. In a mixing machine, the combination of a mixing cylinder; mixing members in the cylinder having working faces at right angles to the axis of the cylinder; means for rotating one of said members and for moving one of them axially to compress an interposed batch; and means for cooling one of said members.

5. In a mixing machine, the combination of a mixing cylinder; mixing members in the cylinder having working faces at right angles to the axis of the cylinder; means for rotating one of said members and for moving one of them axially to compress an interposed batch; and means for cooling the cylinder walls.

6. In a mixing machine, the combination of a mixing cylinder; mixing members in the cylinder having working faces at ri ht angles to the axis of the cylinder; means or rotating one of said members and for moving one of them axially to compress an in terposed batch; and means for coolin one of said members and the cylinder wa s.

' 7. In a mixing machine, the combination of a mixing cylinder; mixing members in the cylinder havin working faces at right angles to the ax1s of the cylinder; means for rotating one of said members and for movmg one of them axlally to compress an interposed batch iland a door in the cylinder wall,

leading to t e space between sald members.

8. In a mixing machine, the combination of a mixing cyllnder; mixing members in the cylinder having working faces at right angles to the axis of the cylinder; means for rotating one of'said members and for moving one of them axially to compress an interposed batch; and a circumferentially arranged door leading to the space between said members.

9. In a mixing machine, the combination of a mixing cylinder; mixing members in the cylinder having working faces at right angles to the axis of the cylinder; means for rotating one of said members and for moving one of them axially to compress an interposed batch; a' door in the c linder Wall leading to the space between sai members; and means for cooling said door.

10. In a mixing machine, the combination of a mixing cylinder; mixing members in the cylinder having. working faces at right angles to the axis of the cylinder; means for rotating one of said members and for moving one of them axially to compress an interposed batch; a circumferential opening in the cylinder having circumferentially extending door seats thereon; and two doors for closing the opening, one of said doors having an inwardly faced seat for engaging the seat on the cylinder and an outwardly faced seat and the other of said doors having two inwardly faced seats for engaging one seat on the cylinder and the outwardly faced seat on the other of said doors.

11. The process of. mixing plastic material which consists in inclosing and confining it circumferentially andaxially and subjecting it to pressure rotatively applied in an axial direction.

12. The process of mixing plastic material which consists in incloslng andconfin-- ing it circumferentially and axially and subjecting it to pressure rotatively applied in an axial direction, and varying the temperature of the plastic through the confining medium.

In testimony whereof we have hereunto set our hands.

JOSEPH G. MOOMY. JOSEPH H. MOOMY. 

